so it would be wired ring to the relay. The ring always has power running through it that would cause the contact on the C4 unit to always be tripped. then when the doorbell is press the relay with close and then send the signal to the contact on the controller which can then program announcements or what ever. all with out an internet connection

IN Programming there should be variables under the mockupancy driver that should be along the lines of in playback or playing or something.
you can always add the snmp agent and get all of your systems variables to see how it is defined.

this would be a better questions for control4 tech or the dealer forums.
as far as an answer to your question. You may want to try reinstalling composer. and make sure the controllers are on the same os 2.8.1 or higher to use this wizard

sounds like your connections may not be setup correctly. Also remember unless your tv has audio volume feed back control4 will not mute it. if audio is able to make it to the tv or video multi ways control4 will chose the path of least resistance.